i had a 2.2 4banger in a daytona front drive one time that had only 4lbs oil pressure at a hot idle.
i figured i would shim up the bypass valve just a touch to improve it. those have the spring retained by a soft plug and a cotter pin.
i fired it up and heard a big POP. shut it down to see what that was, and found the oil filter had burst. and you know THAT mess.
seems i had installed the soft plug backward on the spring. [the spring should have been INSIDE the soft plug with the shim] not the spring, shim, then the backward soft plug.
i wondered why i had such a difficult time inserting the cotter pin to retain the spring.
after i was done re-doing the mess, [correctly this time] i had a whole 10lbs of oil pressure at hot idle ! ran it that way for years after. never blew up another oil filter.........